【摘要】 根据中国气象数据网中国大陆2009—2014年逐日降水格点数据,在月、年时间尺度上,采用误差、相关系数以及相对误差等指标,对热带降水测量(TRMM)降水数据进行精度评价。结果表明在月、年尺度上TRMM降水数据精度均较高,年均误差分布与年降水量相关;月尺度相关系数达到了0.99,年尺度相关系数为0.86;TRMM精度主要受降水强度和海拔地形影响;在干旱和高海拔地区TRMM降水数据精度较低。更多还原

【Abstract】 According to the 4 years( 2009-2014) daily rainfall data of China’s mainland from the China Meteorological Data Service Center( CMDC),the precision of TRMM precipitation data is evaluated by indicators such as error,correlation coefficient,and relative error on the time scale of months and years respectively. The results show the TRMM precipitation data is of high accuracy on the monthly and annual scales. The monthly correlation coefficient is 0. 99 and the annual correlation coefficient reaches to 0. 86. The accuracy of TRMM precipitation data is mainly affected by precipitation intensity and altitudes. In arid and high-altitude regions the accuracy of the TRMM precipitation data is low.更多还原